<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
    <link rel="stylesheet" type="text/css" href="css/header.css" />
    <script src="js/jquery.js"></script>
    <script src="js/bootstrap.js"></script>
    <title>Document</title>
    <style>
      #header{
        background-image: none;
      }
      #bg {
        width:100%;
        height:100%;
        position: fixed;
        background-image: url(./img/bg.jpg);
        background-size: cover;
      }
      #mainer .jumbotron {
        margin-bottom: 0;
        background-color: rgba(1, 1, 1, 0);
        color:#00BFFF;
      }
      #footer {
        position: fixed;
        width: 100%;
        bottom: 0;
        background-color: rgba(1, 1, 1, 0);
        color:#00BFFF;
      }
    </style>
  </head>
  <body>
    <div id="bg">
      <div id="header"></div>
      <div id="mainer">
        <div class="jumbotron">
          <h1>Hello, world!</h1>
          <p>数据改变生活</p>
          <p>
            
          </p>
        </div>
      </div>
      <div id="footer"></div>
    </div>
    <script>
      $(function () {
        $("#header").load("./header.html");
        $("#footer").load("./footer.html");
      });
    </script>
  </body>
</html>
